Easy C Rider Easy-paced bicycle rides, 15 to 35 miles on selected Saturdays and Sundays in the Worcester area. Helmets required. Starting times and locations are posted each week at www.easycrider.com or leader@easycrider.com.

Celebration of the Life of Michael Jackson Local artists perform his music, watch the preparation of his concert “This Is It,” and eat cake, 1-5 p.m. Aug. 28. Worcester Public Library, 3 Salem Square, Worcester. (508) 799-1655.

Hike with members of the Leominster Land Trust and the Recreation Department at Wachusett Reservoir, 9 a.m.-noon Aug. 28. Meet at 9 a.m. at Barrett Park, Barrett Park Drive, Leominster, to car pool. Hike will be led by Kelley Freda. All ages welcome. Bring water, snack, sunscreen, bug repellent and binoculars. (978) 534-5964.

Rock Detectives Learn some simple clues that will help identify the rocks and minerals, noon-1 p.m. Aug. 28. All ages. Meet at the pavilion at Purgatory Chasm State Reservation, 198 Purgatory Road, Sutton. (508) 234-3733 or Purgatory.Chasm@state.ma.us.

Summer Brewfest Microbrewers from all over New England, music by the British Yankees and barbecue, 4 p.m. Aug. 28. $25; Designated driver, $5. 21 and older with legal ID. Indian Ranch, 200 Gore Road, Webster. (508) 943-3871 or www.indianranch.com.

Comics for a Cure Comedy Night 9 p.m. Aug. 28. $15. Point Breeze Restaurant, 114 Point Breeze Road, Webster. All proceeds will help Bryce Adams and his family fight against MPS-III A Sanfilippo syndrome, a rare and fatal metabolic disorder/storage disease. (774) 280-6222, (508) 943-0404 or www.fightforbryce.com.